[PATCH] blktrace: allow live tracing to get full subbuffers as well

The poll() timeout will keep us reading smaller buffers, if the data
generation rate isn't high enough.

diff --git a/blktrace.c b/blktrace.c
index 8b6c93c11f5b2237c5a91a4c583b9bfa0293e3de..337f142631ce721a1077b5fbfa48f58074b375c4 100644 (file)
--- a/blktrace.c
+++ b/blktrace.c
@@ -285,7 +285,7 @@ static void wait_for_data(struct thread_information *tip)
        struct pollfd pfd = { .fd = tip->fd, .events = POLLIN };
 
        do {
-               poll(&pfd, 1, 10);
+               poll(&pfd, 1, 100);
                if (pfd.revents & POLLIN)
                        break;
                if (tip->ofile_stdout)
@@ -332,21 +332,13 @@ static inline void tip_fd_lock(struct thread_information *tip)
 static int get_subbuf(struct thread_information *tip)
 {
        struct tip_subbuf *ts;
-       int ts_size, ret;
-
-       /*
-        * live tracing should get a lower count to make it more "realtime"
-        */
-       if (tip->ofile_stdout)
-               ts_size = 1024;
-       else
-               ts_size = buf_size;
+       int ret;
 
        ts = malloc(sizeof(*ts));
-       ts->buf = malloc(ts_size);
-       ts->max_len = ts_size;
+       ts->buf = malloc(buf_size);
+       ts->max_len = buf_size;
 
-       ret = read_data(tip, ts->buf, ts_size);
+       ret = read_data(tip, ts->buf, ts->max_len);
        if (ret > 0) {
                ts->len = ret;
                tip_fd_lock(tip);